A ``littlest Higgs'' model with custodial SU(2) symmetry
By Spencer Chang. 2003
135 citations recorded by the source corpus.
In this note, a ``littlest higgs'' model is presented which has an approximate custodial SU(2) symmetry. The model is based on the coset space SO(9)/(SO(5) × SO(4)). The light pseudo-goldstone bosons of the theory include a single higgs doublet below a TeV and a set of three SU(2)W triplets and an electroweak singlet in the TeV range. All of these scalars obtain approximately custodial SU(2) preserving vacuum expectation values. This model addresses a defect in the earlier SO(5) × SU(2) × U(1) moose model, with the only extra complication being an extended top sector. Some of the precision electroweak observables are computed and do not deviate appreciably from Standard Model predictions. In an S-T oblique analysis, the dominant non-Standard Model contributions are the extended top sector and higgs doublet contributions. In conclusion, a wide range of higgs masses is allowed in a large region of parameter space consistent with naturalness, where large higgs masses requires some mild custodial SU(2) violation from the extended top sector.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/31287b69aedaf6d3794bab3d69ef761743a65989
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In Astronomy and Astrophysics
- I. Low
- M. Schmaltz
- Hsin-Chia Cheng
- David Tucker-Smith
- T. Hambye
- Konstantin T. Matchev
- Kyoungchul Kong
In Nuclear and High Energy Physics
- David Tucker-Smith
- I. Low
- M. Schmaltz
- Hsin-Chia Cheng
- Konstantin T. Matchev
- Kyoungchul Kong
- M. Perelstein
- T. Hambye
Citations in the corpus
- LITTLE HIGGS THEORIES (2005, methodology): “ussed in the previous section are one example. Because tree-level effects associated with the T-odd particles are removed, bounds from precision electroweakdata can be satisfied even with f below 1 TeV [21, 23]. The models incorporating SU(2)C, also already discussed, are another example. These provid”
- Little hierarchy, little higgses, and a little symmetry (2004, methodology): “Little Higgs theories [9, 10, 11, 12, 13, 14, 15, 16, 17, 18] provide an alternative approach to stabilize the electroweak scale based on a non-linear chiral Lagrangian of a coset space G/H .”